Published on in Vol 23, No 4 (2021): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/28216, first published
.

1 Alice Lee Centre for Nursing Studies, Yong Loo Lin School of Medicine, National University of Singapore, Singapore , SG
2 National University Heart Centre Singapore, National University Hospital , Singapore , SG
3 Regional Health System, National University Health System , Singapore , SG